There are strange lines that appear on my glass in my phone render. How do I get rid of them?
Your model has very bad topology (N-gons) and that's the problem of the artifacts in render (but you can see problems also without rendering, check my screenshot)

more info:
What is an Ngon?
If you're unfamiliar with what an ngon is let's go over a very quick review so you can understand this question a little more. An ngon is a face or polygon that is made up of five or more sides or edges connected by five or more vertices. Anything over a quad (4 sides) is considered an ngon.
More here (https://www.pluralsight.com/blog/film-games/ngons-triangles-bad) and on youtube/google if you look for ngons.